Solar simulators are used to test components and systems under controlled and repeatable conditions, often in locations with unsuitable insolation for outdoor testing. The growth in renewable energy generation ha. ••Light sources used for solar simulators in thermal applications are. The growing demand for energy, combined with issues of environmental pollution, climate change, and the rapid depletion of fossil fuels, have encouraged the research and developmen. 2.1. Blackbody radiator spectrumA blackbody is an idealised object which is a perfect radiation emitter and absorber. A blackbody radiator has the maximum possibl. Light source selection is the principal step in designing a solar simulator with suitable simulated solar radiation. This light source is required to meet several criteria: spectral quality, illuminati. The design of a solar simulator can be divided into three major steps: 1) defining system output requirements, 2) reviewing different light sources with their characteristics a.